upgrade release version to 1.8.1
upgrade release version to 1.8.1

danielsoro/deltaspike,apache/deltaspike,struberg/deltaspike,struberg/deltaspike,apache/deltaspike,danielsoro/deltaspike,apache/deltaspike,struberg/deltaspike,struberg/deltaspike,danielsoro/deltaspike,apache/deltaspike,danielsoro/deltaspike